Magnetic separator.



A. H. KIDNEY.

MAGNETIC SEPARATOR APPLICATION FILED AUGJB, I914.

l wfiggo Patented Apr. 27, 1915.

ALFREDH. KIDNEY, or ORANGE, NEW JERSEY.

MAGNETIC snrron.

Application filed August 18,

To all whom it may concern:

Be it known that I, ALFRED H. KIDNEY, a citizen of the United States,residing at Orange, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Magnetic Separators, ofwhich the following is a specification.

This invention relates to an improvement in magnetic separators, and theobject is to provide an instrument which can be manipulated easily andreadily, and can be used in testing magnetic sands carrying platinum andgold preliminary to concentration.

This invention relates'to the use of the well-known horse-shoe type ofmagnet, and to obviate the difiiculty encountered in removing particlesf rom the bearing face or ends of the magnet, I have providedmeans forremoving the particles or grains from the magnets.

The invention relates to still other novel features of construction andcombinations of parts which will be hereinafter more fully descrilid andpointed out in the claims.

In the accompanying drawings: Figure 1 is a view in side elevation ofthe invention; Fig. 2 is a similar view showing the shield in 1tslowered position; Fig. 3 is a longitudinal vertical sectional view ofthe shield; Fig. 4 is a detail view of the guide blocks, and Fig, 5 is aview in edge elevation showing a slightly modified form.

The magnet A is preferably of the standard hand horse-shoe type, inwhich the poles 1, 1 taper inwardly. Onthe inner side of the poles arechannels or lrecesses 2, 2. A shield B is adapted. to be fitted over thelower end of the magnet, and over each pole 1, the upper portion 3 ofthe shield being of a diamagnetic material, while the lower portion 4 ofthe shield is of a paramagnetic material, and which can be-readilyenergized by the poles when the poles are brought into contacttherewith. The lower portion 4 is constructed so that all four sides ofthe poles will engage the bottom, producing a greater area forattracting the particles. A recess 5 is formed centrally of the lowerportion 4: of the member B, so that a greater attracting area isproduced.

Connected to the shield'B is a loop "handle made of spring metal 6,which loop handle carries- U-shaped guide members 7, 7 which arereceived in the chann s 7A disk 8 1914. Serial No. 857,380-

TED STATES PA orrron.

Specification of Letters Patent. Patented Apr. 27, 1915'.

inserted in the upper end of thehandle 6,

and is fastened thereto by means of a screw 9.

In the modification shown in Fig. 5, the disclosure is the same as inFigs. 1 and 2, with the exception of the pins 10, which are substitutedfor the recesses 22. These pins 10, 10 form a means for limiting themove ment of the guide members 7, 7.

The operator grasps the disk 8 of the handle when it is desired tooperate the shield B. When the shield B is moved to the position shownin Fig. 1, the lower portion of the shield would be energized by thepoles of the magnet, and the particles will be attracted to the shield.When it is desired to remove the particles, the handle 6 is forceddownwardly, to the position as shown in Fig. 2, bringingthe poles withinthe upper 'portion 3 of the shield, B, which is incapable of beingenergized, thereby deenergizing the lower portion 4 of the shield, sothat the particles will fall readily from the shield.

The channels or recesses 2 control the movements, that is, the lowerends of the channels limit the downward movement of the handle, and theupper ends of the channels limit the upward movement of the handle.

I claim:

1. The combination with a magnet having poles, of a shield mountedthereon, means carried by the magnet connected to the 'shield for movingthe shield whereby the contact will be made between the shield and polesfor energizing the shield to attract ing the contact between said shieldand poles, means on the handle having sliding engagement with themagnet, and means for limiting the movement of said sliding means forcontrolling the movement of the handle.

3. The combination with a magnet having poles, of a shield movablymounted on the oles and provided with a contacting surace adapted to bebrought into engagement IQ 1,1sm92 with the r idles for the eneigization of the for iiihiting the inovement of the members shield, a loophandle connected to said shield for making and breakingtheeontactbetween the shield and magnet, a disk mount: ed on thehandle'whereby the handle can be gripped foroperatin the shield, guidescon nected to the hall e having engagement.

with the magnet, means on the magnet and handle. a 4 10 In testimonywhereof I afiix my signature,. in the presence of two witnesses.

ALFRED H. KIDNEY.

Witnesses:

HOWARD C. RAND, HENRY J. DIEFENBACHER.

